NFTs are touted as revolutionary to market and monetize digital assets. However, critics have questioned NFT value, labeling it as fraudulent. Despite mixed reviews, various firms are leveraging NFTs as a value proposition for customers. In this study, using service-dominant (S-D) logic, we explore how NFTs can help firms in value co-creation and service exchange. We propose and test a conceptual framework using a multi-method approach -1) we investigate NFTs popularity using historical news articles spanning ten years, 2) we use a case study to examine business NFT use in value co-creation and service exchange, subsequently, proposing a conceptual framework illustrating such value exchange, 3) we test our conceptual framework by analyzing data from multiple sources, including surveys, online forums, social media, and transactions. Results from our study, provide business valuable insight into using NFTs as value co-creation and service exchange tool.

목적 : 본 연구에서는 우세안 검사법 중 하나인 Hole-in-the-card법을 이용하여 우세안을 검출하고 대비도에 따른 우세안 및 비우세안의 시력을 비교해 보고자 하였다. 방법 : 안과적 질환이 없는 20대 성인 남녀 60명을 대상으로 Hole-in-the-card법을 시행하였고, 100% 고 대비시표와 10% 저대비시표를 이용하여 각 대비도에서의 시력을 측정하여 비교하였다. 결과 : 대상자의 우세안과 비우세안의 평균 고대비시력(대비도 100%)은 각각 0.07±0.05 logMAR, 0.11±0.13 logMAR이며, 평균 저대비시력(대비도 10%)는 평균 저대비시력의 각각 0.31±0.09 logMAR, 0.27±0.08 logMAR로 고대비시력은 우세안이 비우세안에 비해 우수하게 측정되었고(p=0.049), 저대비시력은 비우세안이 우세안에 비해 더 우수하게 측정되었다(p=0.003). 고대비시표와 저대비시표에서 같은 방향의 눈의 시력이 우수하게 측정된 경우의 양안의 시력 차는 0.16±0.23 logMAR였고, 고대비시표와 저대비시표에서 우수하게 측정 된 눈의 방향이 달라진 경우의 양안의 시력 차는 0.05±0.00 logMAR로 나타났다. 결론 : 우세안은 비우세안에 비해 고대비시력이 우수하게 측정되었지만 고대비에서 양안의 시력 차이는 저대비 시력에 영향을 줄 수 있으므로 교정 시 환경 및 시생활의 목적에 따라 반드시 고려해야 할 것으로 사료된다.

The purpose of this paper was to investigate the comparison of balance and muscle strength between dominant and non-dominant legs in adults. Thirty adults in their 20s participated in this study. The dominant and non-dominant legs were selected based on the dominant hands of the target. The subject's muscle strength of legs was measured with Nicholas MMT, and the balance was measured with BIO-Rescue. We compared the dominant and non-dominant legs based on the results. The result, indicated no statistical difference on balance and muscle strength between dominant and non-dominant legs(p>.05). The results of this study will be helpful in setting the effective treatment direction and treatment level, and in controlling posture, balance and motor function.

목 적 : 우세안과 비우세안의 결정 요인들을 조사하고, 성인 남녀의 성별에 따른 차이를 비교분석하였다. 방 법 : 성인 92명을 대상으로 Hole-in-the-card method로 우세안을 결정하였고, 안압, 등가구면굴절 력, 난시도, 카파각을 측정하여 우세안과 비우세안의 차이를 성별로 비교하였다. 결 과 : 성별에 따른 안압(p=0.570), 등가구면굴절력(p=0.465)은 통계적으로 유의하지는 않았다. 우세안 에서 남자의 난시도가 유의하게 크게 나타났으며, 양안 난시도에서도 남자의 난시도가 유의하게 크게 나타 났다(p=0.012). 카파각은 우세안과 비우세안에서 여자의 카파각이 유의하게 나타났으며, 양안 카파각도 여 자의 카파각이 통계적으로 유의하게 나타났다(p=0.002). 결 론 : 우세안과 비우세안의 요인을 성인 남녀의 성별로 비교하였을 때, 남자의 난시도와 여자의 카파각 이 유의하게 크게 나타났다.

Traditionally marketing policies are considered to be the matter of choice by market participants. It is normally so, except the operators of essential facilities (such as pipelines or electric grid) or companies where prices are subject of direct price regulation (heating, gas and electricity supply etc.) However, in some exceptional circumstances responsible government agencies impose regulatory constraints on important marketing decisions of the companies outside regulated industries. One important example are remedies imposed by competition agencies, especially in BRICS countries, which sometimes take form of public regulated commercial policies as a set of rules for largest (dominant) sellers in B2B sectors how to select counterparties, how to set contract terms and how to enforce contracts. Wider use of commercial policies in a regular basis is recently under consideration in Russia. The goal of the paper is to discuss the expected impact of remedies application on the marketing policies, managerial incentives and performance of the companies, which are subject of remedies, by the example of several Russian cases. Our main conclusion is that impact of marketing policies and managerial incentives is the key to predict the impact of remedies on competition itself.

The purpose of this study was to comparatively analyze the active stability of shoulder joints according to the frequency of overhead motions, such as serving and spiking, engaged in by female professional volleyball athletes who play different positions, and to provide the results as the basic data for developing exercise programs to prevent shoulder joint injuries. The subjects of this study were 50 Korean female professional volleyball players and positions were as follows: left and right attackers, centers, setters, and liberos. The external rotation and internal rotation muscle strength and muscle strength ratios of the dominant and non-dominant arms of all subjects were measured using Biodex. The results of this study are as follows: Frist, no significant differences were found in the internal and external rotation muscle strength of the dominant and non-dominant arms between positions. Second, for the shoulder joint muscle strength ratio of the dominant arm, by position, the setter showed significantly greater stability compared to the other positions. Third, for the shoulder joint muscle strength ratio of the non-dominant arm, by position, no significant difference in stability between positions was found. Fourth, it was found that the dominant arm had significantly greater instability of the shoulder joint than the non-dominant arm for attackers and centers, but no significant difference was found for setters and liberos. This study comparatively analyzed the muscle strength ratios of the external/internal rotations and dominant/non-dominant arms, which can determine the stability of the shoulder joints between female professional volleyball playing positions that engage in jumps and spikes using only the dominant hand and positions that do not.

Grip strength is an objective indicator for evaluating the functional movement of upper extremities. Therapists have been using it for a long time as an excellent barometer for evaluating the therapy process, therapeutic effects and prognosis of patients with injuries in upper extremities. This study investigated the effects of extensor pattern position and elastic taping of non-dominant hand on the grip strength of dominant hand among general adults. The subjects of this study were 23 males and 7 females from physical therapy departments of 3 Universities located in Busan who agreed to participate in the experiment and the resultant data were analyzed using SPSS version 12.0. The results of the study were as follows. First, there was a significant difference between the grip strength of dominant hand when the non-dominant hand was at the neutral position and that when the non-dominant hand was at the extensor pattern position and both hands were at the maximum strength simultaneously (Bonferroni-corrected p<.001). Second, there was a significant difference between the grip strength of dominant hand when the non-dominant hand was at the neutral position and that when the elastic taping of non-dominant hand was applied (Bonferroni-corrected p<.001). Third, there was no significant difference between the grip strength of dominant hand when the non-dominant hand was at the extensor pattern position and both hands were at the maximum strength simultaneously and that when the elastic taping of non-dominant hand was applied. The irradiation effects through the extensor pattern position of non-dominant hand and application of the elastic taping to non-dominant hand showed significant results in improving the maximum grip strength of dominant hand. This finding could be suggested as the probability for the indirect treatment of the upper extremities of hemiplegia and orthopedic patients due to the long-term fixing of upper extremities.

The purpose of this study was to investigate the effects of different objects and target location of dominant hand on the non-dominant hand movement kinematics in a bimanual reaching task. Fifteen right-handed volunteers were asked to reach from same starting point to the different target point of right and left hand with grasping the objects of different size. Independent variables were 1) three different object types (small mug cup, name pen, and PET bottle), and 2) three different target locations (shorter distance, same distance, and longer distance than the non-dominant hand) of the dominant hand. Dependent variables were movement time (MT), movement distance (MD), movement mean velocity (MVmean), and movement peak velocity (MVmean) of the non-dominant hand. Repeated measures two-way analysis of variance (ANOVA) was used to test for differences in the non-dominant hand movement kinematics during bimanual reaching. The results of this study were as follows: 1) MT of the non-dominant hand was increased significantly when traveling with grasping the mug cup and reaching the far target location, and was decreased significantly when traveling with grasping the PET bottle and reaching the near target location of the dominant hand. 2) MD of the non-dominant hand was significantly increased during reaching the far target location, and significantly decreased during reaching the near target location with dominant hand. 3) MVmean of the non-dominant hand was increased significantly when traveling with grasping the PET bottle, and was decreased significantly when traveling with grasping the mug cup of the dominant hand. Therefore, it can be concluded that the changes of the ipsilateral hand movement have influence on coupling of the contralateral hand movement in bimanual reaching.

Purpose: The purpose of this study was to investigate the effective learning method of non-dominant hand for the sequential timing performance. Methods: Twenty right-handed undergraduate and graduate students were randomly assigned to the non-dominant hand practice group that practiced with only non-dominant hand or the bimanual practice group that practiced with both hands simultaneously. The participant was asked to alternatively press two buttons six times with the index finger of the non-dominant hand or both hands in order to reproduce accurately the goal rhythm pattern (3,600ms in total duration). The goal rhythm pattern had three rhythm types and two perceptual structures, which the (in)congruent structure was that the structure of auditory signal was (or not) in accordance with that of visual signal. Results: Bimanual practice group was more effective for absolute-timing learning than non-dominant hand practice group. Although absolute timing performance improved in congruent structure during acquisition phase, the learning effect on absolute timing was occurred in incongruent structure. Relative timing performance of two groups improved in congruent structure during acquisition phase, but the learning effect on relative timing was occurred in both perceptual structures. Conclusion: We suggest that practice methods should be applied differently for absolute timing or relative timing, and the possibility of improving the learning effect of a non-dominant hand by utilizing an incongruent structure of visual-auditory information.